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Chapter 6: Annual Cash Flow Analysis

Chapter 6: Annual Cash Flow Analysis. Annual Percentage Rate. Chapter 6: Techniques for Cash Flow Analysis Annual Cash Flow Analysis: Analysis Period = Alternative Lives Analysis Period = Common Multiple of Alt. Lives Analysis Period for a Continuing Requirement

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Chapter 6: Annual Cash Flow Analysis

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  1. Chapter 6: Annual Cash Flow Analysis Annual Percentage Rate Chapter 6: Techniques for Cash Flow Analysis Annual Cash Flow Analysis: Analysis Period = Alternative Lives Analysis Period = Common Multiple of Alt. Lives Analysis Period for a Continuing Requirement Infinite Analysis Period

  2. Techniques for Cash Flow Analysis • Present Worth Analysis • Annual Cash Flow Analysis • Rate of Return Analysis • Other Techniques: • Future Worth Analysis • Benefit-Cost Ration Analysis • Payback Period Analysis • Chapter 5 • Chapter 6 • Chapter 7 • Chapter 9

  3. Techniques for Cash Flow Analysis SA A A A A Present Worth Analysis: PVA(0)=-RA+A(P/A,i,n)+SA(P/F,i,n) PVB(0)=-RB+B(P/A,i,n)+SB(P/F,i,n) If PVA(0)>PVB(0) => choose A, otherwise => choose B. Annual Cash Flow Analysis: EUACA=RA(A/P,i,n) EUABA=A+SA(A/F,i,n) (EUAB-EUAC)A=A+SA(A/F,i,n)- RA(A/P,i,n) (EUAB-EUAC)B=B+SB(A/F,i,n)- RB(A/P,i,n) If (EUAB-EUAC)A>(EUAB-EUAC)B => choose A, otherwise => choose B. 0 1 2 3 … n RA B B B B SB 0 1 2 3 … n RB (EUAB-EUAC)A (EUAB-EUAC)A (EUAB-EUAC)B (EUAB-EUAC)B (EUAB-EUAC)A (EUAB-EUAC)A (EUAB-EUAC)A (EUAB-EUAC)B (EUAB-EUAC)B (EUAB-EUAC)B 0 1 2 3 … n 0 1 2 3 … n

  4. Analysis Period Equals to Alternative Lives When the analysis period for an economy study is the same as the useful life for each alternative, we have an ideal situation. There are no difficulties. The economy study can be based on the analysis period.

  5. Analysis Period = Common Multiple of Alternative Lives Example Two pumps are being considered for purchase. If interest is 7%, which pump should be bought. Assume that Pump B will be replaced after its useful life by the same one EUACA = $7,000 (A/P, 7%, 12) - $1,500 (A/F, 7%, 12) EUACB = $5,000 (A/P, 7%, 6) - $1,000 (A/F, 7%, 6) EUACA = $797 EUACB = $909 Under the circumstances of identical replacement, it is appropriate to compare the annual cash flows computed for alternatives based on their own different service lives (12 years, 6 years). $1,500 0 1 2 3 4 5 6 7 8 9 10 11 12 $7,000 $1,000 $1,000 0 1 2 3 4 5 6 7 8 9 10 11 12 $5,000 $5,000 replace B Choose Pump A

  6. Analysis Period for a Continuing Requirement Many times the economic analysis is to determine how to provide for a more or less continuing requirement. There is no distinct analysis period. The analysis period is undefined. In case when alternatives were compared based on PW analysis, the least common multiple of alternative lives was found, and present worth for that time is calculated. In case alternatives are compared based on annual cash flow analysis, it is appropriate to compare the annual cash flows computed for alternatives based on their own different service lives. Example EUACA = $797 EUACB = $684

  7. Infinite Analysis Period Motivating Example Consider the following three mutually exclusive alternatives: Assuming that Alternatives B and C are replaced with identical replacements at the end of their useful lives, and an 8% interest rate, which alternative should be selected? Case 1. We have alternatives with limited (finite) lives in an infinite analysis period situation: If we assume identical replacement (all replacements have identical cost, performance, etc.) then we will obtain the same EUAC for each replacement of the limited-life alternative. The EUAC for the infinite analysis period is therefore equal to the EUAC for the limited life situation. With identical replacement: EUACfor infinite analysis period = EUAC for limited life n EUACB= $150(A/P,8%,20) - $17.62 EUACC= $200(A/P,8%,5) - $55.48

  8. Infinite Analysis Period Case 2. Another case occurs when we have an alternative with an infinite life in a problem with an infinite analysis period. In this case, EUACfor infinite analysis period = P (A/P,i,) + any other annual (costs-benefits) (A/P,i,) = 1/i EUACA= $100(A/P,8%,) - $10.00 = $100 *0.08 - $10.00 = $-2.00 EUACB= $150(A/P,8%,20) - $17.62 = $150*0.1019- $17.62 =$-2.34 EUACC= $200(A/P,8%,5) - $55.48 = $200*2.505 - $55.48 =$-5.38 The most general case for annual cash flow analysis is when the analysis period and the lifetimes of the alternatives of interest are all different. In this case, terminal values at the end of the analysis period become very important.

  9. Analysis Criteria

  10. Example • Three alternatives are being considered for improving an operation on the assembly line. Each of the alternatives has a 10 year life and a scrap value equal to 10% of its original cost.

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